1685016656 has 20 divisors (see below), whose sum is σ = 3370034304. Its totient is φ = 815330400.

The previous prime is 1685016649. The next prime is 1685016661. The reversal of 1685016656 is 6566105861.

1685016656 is an admirable number.

It is a super-2 number, since 2×1685016656² = 5678562261994844672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1698110 + ... + 1699101.

Almost surely, 2^1685016656 is an apocalyptic number.

1685016656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1685016656 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1685016656 is a wasteful number, since it uses less digits than its factorization.

1685016656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3397250 (or 3397244 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 1685016656 is about 41048.9543837599. The cubic root of 1685016656 is about 1189.9664929482.

The spelling of 1685016656 in words is "one billion, six hundred eighty-five million, sixteen thousand, six hundred fifty-six".